It is advised to contact the local post office or mail carrier before installing the mailbox to ensure its correct placement at the street. Generally, mailboxes are installed at a height of 41”45” from the road surface to the point of mail entry for a locking mailbox, and are set back 6*8" from the front face of the curb or road edge to the mailbox door. Patented Fast-Trak® Mounting Plate makes installation easy. Fits almost any post or platform.